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Internal Consistency of Event-Related Potentials Associated with Cognitive Control: N2/P3 and ERN/Pe

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  • Wim J R Rietdijk
  • Ingmar H A Franken
  • A Roy Thurik

Abstract

Recent studies in psychophysiology show an increased attention for examining the reliability of Event-Related Potentials (ERPs), which are measures of cognitive control (e.g., Go/No-Go tasks). An important index of reliability is the internal consistency (e.g., Cronbach's alpha) of a measure. In this study, we examine the internal consistency of the N2 and P3 in a Go/No-Go task. Furthermore, we attempt to replicate the previously found internal consistency of the Error-Related Negativity (ERN) and Positive-Error (Pe) in an Eriksen Flanker task. Healthy participants performed a Go/No-Go task and an Eriksen Flanker task, whereby the amplitudes of the correct No-Go N2/P3, and error trials for ERN/Pe were the variables of interest. This study provides evidence that the N2 and P3 in a Go/No-Go task are internally consistent after 20 and 14 trials are included in the average, respectively. Moreover, the ERN and Pe become internally consistent after approximately 8 trials are included in the average. In addition guidelines and suggestions for future research are discussed.

Suggested Citation

  • Wim J R Rietdijk & Ingmar H A Franken & A Roy Thurik, 2014. "Internal Consistency of Event-Related Potentials Associated with Cognitive Control: N2/P3 and ERN/Pe," PLOS ONE, Public Library of Science, vol. 9(7), pages 1-7, July.
    • Handle: RePEc:plo:pone00:0102672
    DOI: 10.1371/journal.pone.0102672
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